Every plan in our catalog is available as a Complete PDF Plan, with an option to add CAD files. It's a simple-sounding choice, but picking the wrong format can mean paying for files you'll never open, or worse, not having the files you actually need when your builder or engineer asks for them. Here's how to decide.
What's in the PDF Plan Set
Every PDF plan set includes the complete architectural drawing package: floor plan, foundation plan, roof framing plan, all four exterior elevations, wall sections, structural details, a window and door schedule, and a full materials list. This is everything required for permit submission and everything a builder needs to construct the structure exactly as designed.
The PDF format is print-ready. You can take it directly to any copy center, print it at full architectural scale, and hand it to your builder or building department without any additional steps.
What CAD Files Add
CAD files are the same drawings in editable DWG format, compatible with AutoCAD, Illustrator, and TurboCAD. The key word is editable: unlike the PDF, which is a fixed, final document, CAD files allow you, your architect, or your engineer to make changes to the actual drawing data.
When You Only Need the PDF
For the majority of buyers, the PDF plan set alone is sufficient. This is the right choice if:
- You're building the plan exactly as designed, with no site-specific modifications
- Your local building department doesn't require an engineer's stamp on the drawings
- You don't anticipate needing to adjust room dimensions, window placement, or structural details
This covers most DIY builders and most buyers working with a general contractor who will build to the plan as drawn.
When You Need CAD Files
CAD files become necessary, not just nice to have, in a few specific situations:
Your jurisdiction requires an engineer's stamp. Some states and counties, particularly those with strict seismic or wind load requirements, require a licensed engineer to review and stamp structural drawings before permit approval. Engineers typically need editable CAD files to do this work efficiently, since cross-referencing and possibly adjusting elements within a PDF is far more time-consuming and limits what changes can be made.
You need site-specific modifications. If your lot has an unusual shape, slope, or setback requirement that doesn't match the plan as drawn, CAD files let your architect or engineer adjust the design to fit your specific site without starting from scratch.
You're changing structural elements. Want to move a window, adjust a roofline, or modify the foundation type from what's shown? That requires working in the original CAD data, not a flattened PDF.
A Practical Way to Decide
Before purchasing, call your local building department and ask two questions: do they require an engineer's stamp for a structure of this type and size, and do they have any site-specific requirements that might require plan modifications. If the answer to either is yes, add CAD files to your order. If not, the PDF alone will serve you well.
Can You Add CAD Files Later?
Yes. If you've already purchased a PDF plan set and later realize you need the CAD files, they're available separately as an add-on. It's worth noting, though, that purchasing both together at the time of your original order is typically more cost-effective than buying them separately later.
Bottom Line
Most buyers only need the PDF. CAD files are worth the additional cost specifically when your jurisdiction requires an engineer's stamp or your site requires custom modifications.